Symptoms. Chevrolet PJJ 2000

For 1990-2009 cars

Important: The Following steps must be completed before using the symtoms tables.

1. Perform the Diagnostic System Check - ABS before using the Symptom Tables in order to verify that all of the following are true:

• | There are no DTCs set.

• | The EBCM can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to ABS Operation .

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the ABS/ETS System. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

• | Inspect the master cylinder reservoir for the proper brake fluid level.

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

### Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• | Traction Off Indicator Always On

• | Traction Off Indicator Inoperative

• | No Communication with Electronic Brake Control Module

• | ABS Indicator Always On

• | ABS Indicator Inoperative

• | Scan Tool Displays Undefined DTC